call for brave ext4 testers in F9, with caveats

[Eric Sandeen]

Eric Sandeen wrote:

> You can explicitly mount it as -t ext4dev, and the next file created
> will make a non-backwards-compatible change when it writes in extent
> format.  From then on, it's an "ext4dev" filesystem with mostly
> non-extent ext3 files on it.  :)

Oh, and getting some airtime on that configuration *would* be good, too.

-Eric